diff --git a/.github/workflows/test_clang_linux.yml b/.github/workflows/test_clang_linux.yml
index 676b323..5ca473b 100644
--- a/.github/workflows/test_clang_linux.yml
+++ b/.github/workflows/test_clang_linux.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        clang_version: [13, 15, 18]
+        clang_version: [13, 15, 17]
         cpp_version: [c++17, c++20]
         stdlib: [libc++, libstdc++] # llvm library and gcc library
         arch: [m64, m32] # 64 and 32 bit
@@ -25,7 +25,7 @@ jobs:
 
         # For simplicity, exclude 32-Bit builds for manually installed clang versions.
         exclude:
-          - clang_version: 18
+          - clang_version: 17
             cpp_version: m32
 
     runs-on: ubuntu-22.04
@@ -40,7 +40,6 @@ jobs:
       uses: KyleMayes/install-llvm-action@v1.9.0
       with:
         version: ${{ matrix.clang_version }}
-        force-version: true
 
     - name: Install libc++ if required
       # libc++ is not installed for all clang versions by default.
diff --git a/.github/workflows/test_clang_win.yml b/.github/workflows/test_clang_win.yml
index fb40537..f2d224c 100644
--- a/.github/workflows/test_clang_win.yml
+++ b/.github/workflows/test_clang_win.yml
@@ -17,7 +17,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        clang_version: [16, 18]
+        clang_version: [16, 17]
         cpp_version: [c++17, c++20]
         buildmode: [~ ,  -O3 -DNDEBUG,  -O3 -DNDEBUG -ffast-math]
 
@@ -30,7 +30,6 @@ jobs:
       uses: KyleMayes/install-llvm-action@v1.9.0
       with:
         version: ${{ matrix.clang_version }}
-        force-version: true
     - name: Build and run tests
       working-directory: ${{env.TEST_DIR}}
       env: